I think the technology of blockchain is irrelevant.
If something can be accomplished on the blockchain, which requires N nodes, a business can probably replicate that same objective with less than N nodes because they don't have to pay the cost of verifying that nodes are acting honestly. This business is incentivized to be honest because otherwise they lose their business. Someone has to pay those costs for the N nodes on the blockchain - who will it be? Transactions seem cheap now because funding for these blockchains is often used to subsidize costs.
You mentioned ease of use, like the use of SDKs, but blockchain technology does not enable that. All blockchain can do is that if you ask it "hey i was told the state of the world was this. is it true?" and the blockchain will tell you yes or no. If you want to provide those kinds of guarantees to customers in a reliable way, all you need is cryptography, not blockchain.
If something can be accomplished on the blockchain, which requires N nodes, a business can probably replicate that same objective with less than N nodes because they don't have to pay the cost of verifying that nodes are acting honestly. This business is incentivized to be honest because otherwise they lose their business. Someone has to pay those costs for the N nodes on the blockchain - who will it be? Transactions seem cheap now because funding for these blockchains is often used to subsidize costs.
You mentioned ease of use, like the use of SDKs, but blockchain technology does not enable that. All blockchain can do is that if you ask it "hey i was told the state of the world was this. is it true?" and the blockchain will tell you yes or no. If you want to provide those kinds of guarantees to customers in a reliable way, all you need is cryptography, not blockchain.